//** smooth navigational menu- by dynamic drive dhtml code library: http://www.dynamicdrive.com
//** script download/ instructions page: http://www.dynamicdrive.com/dynamicindex1/ddlevelsmenu/
//** menu created: nov 12, 2008

//** dec 12th, 08" (v1.01): fixed shadow issue when multiple lis within the same ul (level) contain sub menus: http://www.dynamicdrive.com/forums/showthread.php?t=39177&highlight=smooth

//** feb 11th, 09" (v1.02): the currently active main menu item (li a) now gets a css class of ".selected", including sub menu items.

//** may 1st, 09" (v1.3):
//** 1) now supports vertical (side bar) menu mode- set "orientation" to 'v'
//** 2) in ie6, shadows are now always disabled

//** july 27th, 09" (v1.31): fixed bug so shadows can be disabled if desired.
//** feb 2nd, 10" (v1.4): adds ability to specify delay before sub menus appear and disappear, respectively. see showhidedelay variable below

//** dec 17th, 10" (v1.5): updated menu shadow to use css3 box shadows when the browser is ff3.5+, ie9+, opera9.5+, or safari3+/chrome. only .js file changed.

var ddsmoothmenu = {

    //specify full url to down and right arrow images (23 is padding-right added to top level lis with drop downs):
    //arrowimages: { down: ['downarrowclass', '/templates/images/down.gif', 23], right: ['rightarrowclass', '/templates/images/right.gif'] },
    arrowimages: { down: ['downarrowclass', ''], right: ['rightarrowclass', ''] },
    transition: { overtime: 300, outtime: 300 }, //duration of slide in/ out animation, in milliseconds
    shadow: { enable: true, offsetx: 5, offsety: 5 }, //enable shadow?
    showhidedelay: { showdelay: 100, hidedelay: 200 }, //set delay in milliseconds before sub menus appear and disappear, respectively

    ///////stop configuring beyond here///////////////////////////

    detectwebkit: navigator.useragent.tolowercase().indexof("applewebkit") != -1, //detect webkit browsers (safari, chrome etc)
    detectie6: document.all && !window.xmlhttprequest,
    css3support: window.msperformance || (!document.all && document.queryselector), //detect browsers that support css3 box shadows (ie9+ or ff3.5+, safari3+, chrome etc)

    getajaxmenu: function ($, setting) { //function to fetch external page containing the panel divs
        var $menucontainer = $('#' + setting.contentsource[0]) //reference empty div on page that will hold menu
        $menucontainer.html("loading menu...")
        $.ajax({
            url: setting.contentsource[1], //path to external menu file
            async: true,
            error: function (ajaxrequest) {
                $menucontainer.html('error fetching content. server response: ' + ajaxrequest.responsetext)
            },
            success: function (content) {
                $menucontainer.html(content)
                ddsmoothmenu.buildmenu($, setting)
            }
        })
    },


    buildmenu: function ($, setting) {
        var smoothmenu = ddsmoothmenu
        var $mainmenu = $("#" + setting.mainmenuid + ">ul") //reference main menu ul
        $mainmenu.parent().get(0).classname = setting.classname || "ddsmoothmenu"
        var $headers = $mainmenu.find("ul").parent()
        $headers.hover(
		function (e) {
		    $(this).children('a:eq(0)').addclass('selected')
		},
		function (e) {
		    $(this).children('a:eq(0)').removeclass('selected')
		}
	)
        $headers.each(function (i) { //loop through each li header
            var $curobj = $(this).css({ zindex: 100 - i }) //reference current li header
            var $subul = $(this).find('ul:eq(0)').css({ display: 'block' })
            $subul.data('timers', {})
            this._dimensions = { w: this.offsetwidth, h: this.offsetheight, subulw: $subul.outerwidth(), subulh: $subul.outerheight() }
            this.istopheader = $curobj.parents("ul").length == 1 ? true : false //is top level header?
            $subul.css({ top: this.istopheader && setting.orientation != 'v' ? this._dimensions.h + "px" : 0 })
            $curobj.children("a:eq(0)").css(this.istopheader ? { paddingright: smoothmenu.arrowimages.down[2]} : {}).append( //add arrow images
			//'<img src="' + (this.istopheader && setting.orientation != 'v' ? smoothmenu.arrowimages.down[1] : smoothmenu.arrowimages.right[1])
			//+ '" class="' + (this.istopheader && setting.orientation != 'v' ? smoothmenu.arrowimages.down[0] : smoothmenu.arrowimages.right[0])
			//+ '" style="border:0;" />'
		)
            if (smoothmenu.shadow.enable && !smoothmenu.css3support) { //if shadows enabled and browser doesn't support css3 box shadows
                this._shadowoffset = { x: (this.istopheader ? $subul.offset().left + smoothmenu.shadow.offsetx : this._dimensions.w), y: (this.istopheader ? $subul.offset().top + smoothmenu.shadow.offsety : $curobj.position().top)} //store this shadow's offsets
                if (this.istopheader)
                    $parentshadow = $(document.body)
                else {
                    var $parentli = $curobj.parents("li:eq(0)")
                    $parentshadow = $parentli.get(0).$shadow
                }
                this.$shadow = $('<div class="ddshadow' + (this.istopheader ? ' toplevelshadow' : '') + '"></div>').prependto($parentshadow).css({ left: this._shadowoffset.x + 'px', top: this._shadowoffset.y + 'px' })  //insert shadow div and set it to parent node for the next shadow div
            }
            $curobj.hover(
			function (e) {
			    var $targetul = $subul //reference ul to reveal
			    var header = $curobj.get(0) //reference header li as dom object
			    cleartimeout($targetul.data('timers').hidetimer)
			    $targetul.data('timers').showtimer = settimeout(function () {
			        header._offsets = { left: $curobj.offset().left, top: $curobj.offset().top }
			        var menuleft = header.istopheader && setting.orientation != 'v' ? 0 : header._dimensions.w
			        menuleft = (header._offsets.left + menuleft + header._dimensions.subulw > $(window).width()) ? (header.istopheader && setting.orientation != 'v' ? -header._dimensions.subulw + header._dimensions.w : -header._dimensions.w) : menuleft //calculate this sub menu's offsets from its parent
			        if ($targetul.queue().length <= 1) { //if 1 or less queued animations
			            $targetul.css({ left: menuleft + "px", width: header._dimensions.subulw + 'px' }).animate({ height: 'show', opacity: 'show' }, ddsmoothmenu.transition.overtime)
			            if (smoothmenu.shadow.enable && !smoothmenu.css3support) {
			                var shadowleft = header.istopheader ? $targetul.offset().left + ddsmoothmenu.shadow.offsetx : menuleft
			                var shadowtop = header.istopheader ? $targetul.offset().top + smoothmenu.shadow.offsety : header._shadowoffset.y
			                if (!header.istopheader && ddsmoothmenu.detectwebkit) { //in webkit browsers, restore shadow's opacity to full
			                    header.$shadow.css({ opacity: 1 })
			                }
			                header.$shadow.css({ overflow: '', width: header._dimensions.subulw + 'px', left: shadowleft + 'px', top: shadowtop + 'px' }).animate({ height: header._dimensions.subulh + 'px' }, ddsmoothmenu.transition.overtime)
			            }
			        }
			    }, ddsmoothmenu.showhidedelay.showdelay)
			},
			function (e) {
			    var $targetul = $subul
			    var header = $curobj.get(0)
			    cleartimeout($targetul.data('timers').showtimer)
			    $targetul.data('timers').hidetimer = settimeout(function () {
			        $targetul.animate({ height: 'hide', opacity: 'hide' }, ddsmoothmenu.transition.outtime)
			        if (smoothmenu.shadow.enable && !smoothmenu.css3support) {
			            if (ddsmoothmenu.detectwebkit) { //in webkit browsers, set first child shadow's opacity to 0, as "overflow:hidden" doesn't work in them
			                header.$shadow.children('div:eq(0)').css({ opacity: 0 })
			            }
			            header.$shadow.css({ overflow: 'hidden' }).animate({ height: 0 }, ddsmoothmenu.transition.outtime)
			        }
			    }, ddsmoothmenu.showhidedelay.hidedelay)
			}
		) //end hover
        }) //end $headers.each()
        if (smoothmenu.shadow.enable && smoothmenu.css3support) { //if shadows enabled and browser supports css3 shadows
            var $toplevelul = $('#' + setting.mainmenuid + ' ul li ul')
            var css3shadow = parseint(smoothmenu.shadow.offsetx)/* + "px " + parseint(smoothmenu.shadow.offsety) + "px 5px #aaa" *///construct css3 box-shadow value
            var shadowprop = ["boxshadow", "mozboxshadow", "webkitboxshadow", "msboxshadow"] //possible vendor specific css3 shadow properties
            for (var i = 0; i < shadowprop.length; i++) {
                $toplevelul.css(shadowprop[i], css3shadow)
            }
        }
        $mainmenu.find("ul").css({ display: 'none', visibility: 'visible' })
    },

    init: function (setting) {
        if (typeof setting.customtheme == "object" && setting.customtheme.length == 2) { //override default menu colors (default/hover) with custom set?
            var mainmenuid = '#' + setting.mainmenuid
            var mainselector = (setting.orientation == "v") ? mainmenuid : mainmenuid + ', ' + mainmenuid
            document.write('<style type="text/css">\n'
			+ mainselector + ' ul li a {background:' + setting.customtheme[0] + ';}\n'
			+ mainmenuid + ' ul li a:hover {background:' + setting.customtheme[1] + ';}\n'
		+ '</style>')
        }
        this.shadow.enable = (document.all && !window.xmlhttprequest) ? false : this.shadow.enable //in ie6, always disable shadow
        jquery(document).ready(function ($) { //ajax menu?
            if (typeof setting.contentsource == "object") { //if external ajax menu
                ddsmoothmenu.getajaxmenu($, setting)
            }
            else { //else if markup menu
                ddsmoothmenu.buildmenu($, setting)
            }
        })
    }

} //end ddsmoothmenu variable
ddsmoothmenu.init({
    mainmenuid: "smoothmenu1", //menu div id
    orientation: 'h', //horizontal or vertical menu: set to "h" or "v"
    classname: 'ddsmoothmenu', //class added to menu's outer div
    //customtheme: ["#1c5a80", "#18374a"],
    contentsource: "markup" //"markup" or ["container_id", "path_to_menu_file"]
})